Kefine Quatio - 2DD + 2BA Hybrid IEM

********* AVAILABLE FOR DEMO ********* Kefine Quatio is a hybrid in-ear monitor that combines two dynamic drivers and two balanced armatures per side to deliver a detailed and powerful sound reproduction. The technical construction provides a wide and dynamic sound image where different frequency ranges are handled by separate elements, which contributes to better control in the bass, a full and natural midrange and clear and airy treble. A three-way crossover ensures that the frequencies are divided in a structured way, which minimizes overlap and provides a more precise and coherent sound signature. The headphones are made with CNC-machined aluminum shells that combine robust construction with good comfort and a stable fit. They come with interchangeable nozzles that make it possible to adjust the sound character to personal taste – for example, more neutral, warm or transparent reproduction. The cable is detachable and features a silver-plated copper construction with a modular plug system, often including both 3.5mm and 4.4mm connectors for broad compatibility with mobile phones, computers and Hi-Fi players. Together with a rich accessory package with various eartips and storage case, the Quatio is a versatile and technically advanced IEM for listeners who want high performance and flexibility in one package. Kefine Quatio in brief: * Driver configuration: Hybrid design with 2 dynamic + 2 balanced armatures per side * Frequency range: Wide listening range for bass to treble * Crossover filter: Three-way crossover filter for separation of low, mid and high frequencies * Connection: Removable 0.78 mm 2-pin connector * Termination: Selectable between 3.5 mm SE and 4.4 mm balanced connector * Cable: Silver-plated copper cable (removable) * Housing: CNC-machined aluminum shells * Comfort: Ergonomically shaped shells for a stable fit * Tuning: Replaceable nozzles for adjustable sound profile If you want to read about what different users think of these, you can solve a little more here - HeadFi.org - Kefine Quatio "The Kefine Quatio stand apart in 2025 both in term of musical and technical performance, it’s one of those gems that is super versatile in musicality yet super immersive and engaging too. The coherency between 4 drivers of this type isn’t easy and the bold choice of using wide dynamic driver for full range while other DD pack the punch and 2 other BAs add air, micro dynamic and extra holographic openess is a ”tour de force” in it’s own right, especially at this very very humble asking price. Sure, this can stole some air limpidity around instrument, but here it add analogish fluidity too, only bat ears like mine can be slightly annoy by this which only happen in hardcore critical listening session, when i crave for finest micro details rendering. Simply put: the Quatio are too good for it’s asking price and even at double it will stay a good contender in sub300$ price range, this is the masterpiece of Kefine, and among first recommendation under 200$, especially if you love big soundstage, 3D imaging, wide instrument presence with natural timbre, quality meet quantity bass and fast snappy treble that don’t dominate the show within a beautifully balanced W shape tonality. Add the fact you get prime accessories too and it’s a must buy. Perfect IEM for those entering the hobby as well due to stock nozzle all-arounder tuning." No Borders Audiophile (Jun 2025)